Optical Imaging and Spectroscopy Techniques

Optical imaging and spectroscopy techniques use light — particularly in the near-infrared range, where biological tissue is relatively transparent — to probe the structure and function of the body without ionizing radiation. By measuring how photons scatter and absorb as they travel through tissue, researchers can map blood oxygenation in the brain, track disease-related molecular markers using fluorescent probes, and reconstruct three-dimensional images of tissue composition through methods like diffuse optical tomography. A central challenge is accurately modeling the complex, heterogeneous way light interacts with tissue, which drives ongoing work in computational approaches such as Monte Carlo simulation and refined measurements of tissue optical properties. Active directions include improving the spatial resolution of these inherently diffuse measurements, extending clinical functional neuroimaging beyond the research setting, and developing brighter and more targeted fluorescent agents for surgical guidance and early disease detection.

Works

52,597

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786,482

Keywords

Near-Infrared SpectroscopyOptical ImagingTissue Optical PropertiesFluorescence Molecular ImagingDiffuse Optical TomographyBrain Oxygenation Monitoring